package wiki

import (
	"net/url"
	"strconv"
	"strings"
)

// SearchResult represents a single search hit from the wiki.
type SearchResult struct {
	Title   string `json:"title"`
	Snippet string `json:"snippet"`
	PageID  int    `json:"pageid"`
	Size    int    `json:"size"`
}

// searchResponse is the raw API response shape for action=query&list=search.
type searchResponse struct {
	Query struct {
		Search []SearchResult `json:"search"`
	} `json:"query"`
}

// Search performs a full-text search across wiki pages.
func (c *Client) Search(query string, limit int) ([]SearchResult, error) {
	if limit <= 0 {
		limit = 10
	}

	params := url.Values{
		"action":   {"query"},
		"list":     {"search"},
		"srsearch": {query},
		"srlimit":  {strconv.Itoa(limit)},
		"srprop":   {"snippet|size"},
	}

	var resp searchResponse
	if err := c.get(params, &resp); err != nil {
		return nil, err
	}

	// Strip HTML tags from snippets (the API returns <span class="searchmatch">...</span>)
	for i := range resp.Query.Search {
		resp.Query.Search[i].Snippet = stripHTML(resp.Query.Search[i].Snippet)
	}

	return resp.Query.Search, nil
}

// stripHTML removes HTML tags from a string. Lightweight, no external dep.
func stripHTML(s string) string {
	var b strings.Builder
	inTag := false
	for _, r := range s {
		switch {
		case r == '<':
			inTag = true
		case r == '>':
			inTag = false
		case !inTag:
			b.WriteRune(r)
		}
	}
	return b.String()
}